﻿/*   
    Copyright (C) 2009 Galaktika Corporation ZAO

    This file is a part of Galaktika.BusinessMonitor
 
    Galaktika.BusinessMonitor is a free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
      
    You should have received a copy of the GNU General Public License
    along with Galaktika.BusinessMonitor.  If not, see <http://www.gnu.org/licenses/>.
  
    If GPL v.3 is not suitable for your products or company,
    Galaktika Corp provides Galaktika.BusinessMonitor under a flexible commercial license
    designed to meet your specific usage and distribution requirements.
    If you have already obtained a commercial license from Galaktika Corp,
    you can use this file under those license terms.
*/

using System;
using System.Collections.Generic;
using System.Net;
using Galaktika.BI.Silverlight.Services;

namespace Galaktika.BI.Silverlight.Commands
{
    public static class CommandDispatcher
    {
        public static ServerCommand Dispatch(InvokeSchema schema)
        {
            if (schema != null)
            {
                foreach (var dispatcher in m_Dispatchers.Values)
                {
                    ServerCommand cmd = dispatcher.Dispatch(schema);
                    if (cmd != null)
                    {
                        return cmd;
                    }
                }
            }

            return new MockServerCommand();
        }

        public static ServerCommand CreateAndDispatch(CreateInvokeSchema creator)
        {
            return Dispatch(creator.Invoke());
        }

        private static Dictionary<Type, ICommandDispatcher> m_Dispatchers =
            new Dictionary<Type, ICommandDispatcher>();

        public static void RegisterDispatcher<T>() 
            where T : ICommandDispatcher, new()
        {
            if (!m_Dispatchers.ContainsKey(typeof(T)))
            {
                m_Dispatchers.Add(typeof(T), Activator.CreateInstance<T>());
            }
        }
    }

    public interface ICommandDispatcher
    {
        ServerCommand Dispatch(InvokeSchema schema);
    }
    
    public delegate InvokeSchema CreateInvokeSchema();
}
